Development and Working and Heat treatment strengthening of 2219 Aluminum alloy by mechanical working

• Main Authors: M. Rafi Raza, Rafi, Faiz Ahmad , Faiz, N.Ikram, Nazma, R.Ahmad, Rafiq, A.salam, Salam
• Format: Citation Index Journal
• Published: Asian Network for Scientific Information 2011
• Subjects: TJ Mechanical engineering and machinery
• Online Access: http://eprints.utp.edu.my/5141/1/2219_Al__alloy_%28JAS2011%29.ppt.pdf; http://eprints.utp.edu.my/5141/

The wrought aluminum alloy 2219 was developed using an induction furnace followed by forging and hot rolling for the improvement of properties. Then the alloy was solution treated at 535 ˚C for 48 minutes followed by water quenched and then aged at 210˚C, 230 ˚C and 240 ˚C for different time period. The maximum tensile strength of 411 MPa and hardness of 113.7 HV were achieved at 210 ˚C after 4 hrs aging. The tensile strength of 368.12 MPa and hardness of 95.32 HV were obtained at 240 ˚C after only 1.5 hrs aging time. The strength and hardness values of aged alloy specimens obtained in this work were reasonably higher (strength 51% and hardness 81%) than the specimens which were solution treated and quenched. Microstructures of the aged specimens also provided an evidence of dispersion of second phase precipitates particles in the single phase matrix.